Many webhosts will be able to accompany your requirements, For 200MB in Bandwidth and 25MB in Space then you would not be looking to may anything too massive. Personally I have not used European webhosts though I know there are several of them on the board.
Maybe try having a search for European Webhosts here on WHT or Searching the Shared Offers Section. I know there are several though have not had any experience with them so cannot recommend them to you.
You should not have too many worries grabbing a Webhost with those requirements, Though do remember to research before comitting to them, Check their Terms of Service aswell or ask them some pre-sales questions in regards to the service you wish to run.
As long as your Adult Hosting does not contain Child Porn or is not copyrighting material then you should be fine, Though do double check with the host you would like to purchase with, If they allow it or have limitations to hosting Adult Content.
Best of Luck
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